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RFC 5728

 
 
 

The SatLabs Group DVB-RCS MIB

Part 4 of 4, p. 81 to 95
Prev RFC Part

 


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   OBJECT dvbRcsRequestClassChanId
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support.  Such RCST is qualified as supporting
            the SNMPMISC option, as defined in the SatLabs System
            Recommendations."

   OBJECT dvbRcsRequestClassVccVpi
       MIN-ACCESS read-only
       DESCRIPTION
           "Create access only required if the RCST supports extended
           management support.  Such RCST is qualified as supporting
           the SNMPMISC option, as defined in the SatLabs System
           Recommendations."

   OBJECT dvbRcsRequestClassVccVci
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support.  Such RCST is qualified as supporting
            the SNMPMISC option, as defined in the SatLabs System
            Recommendations."

   OBJECT dvbRcsRequestClassPidPoolReference
        MIN-ACCESS not-accessible
        DESCRIPTION
            "Read-only access required if the RCST supports MPEG traffic
            bursts, according to the MPEG_TRF option, as defined in the
            SatLabs System Recommendations.  Create access only required
            if the RCST also supports extended management support,
            according to the SNMPMISC option, as defined in the SatLabs
            System Recommendations."

   OBJECT dvbRcsRequestClassCra
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsRequestClassRbdcMax
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

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   OBJECT dvbRcsRequestClassRbdcTimeout
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsRequestClassVbdcMax
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsRequestClassVbdcTimeout
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsRequestClassVbdcMaxBackLog
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsRequestClassRowStatus
        MIN-ACCESS read-only
        DESCRIPTION
            "Create access only required if the RCST supports extended
            management support, according to the SNMPMISC option, as
            defined in the SatLabs System Recommendations."

   OBJECT dvbRcsPidValue
        MIN-ACCESS not-accessible
        DESCRIPTION
            "Read-only access required if the RCST supports MPEG traffic
            bursts, according to the MPEG_TRF option, as defined in the
            SatLabs System Recommendations.  Create access only required
            if the RCST also supports extended management support,
            according to the SNMPMISC option, as defined in the SatLabs
            System Recommendations."

   OBJECT dvbRcsPidPoolRowStatus
        MIN-ACCESS not-accessible
        DESCRIPTION

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            "Read-only access required if the RCST supports MPEG traffic
            bursts, according to the MPEG_TRF option, as defined in the
            SatLabs System Recommendations.  Create access only required
            if the RCST also supports extended management support,
            according to the SNMPMISC option, as defined in the SatLabs
            System Recommendations."

           ::= {dvbRcsRcstCompliances 1}

   --=============================================================
   --    units of conformance
   --=============================================================

   --=============================================================
   --    object groups for RCST system
   --=============================================================
   dvbRcsRcstSystemGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsSystemMibRevision,
           dvbRcsSystemSatLabsProfilesDeclaration,
           dvbRcsSystemSatLabsOptionsDeclaration,
           dvbRcsSystemSatLabsFeaturesDeclaration,
           dvbRcsSystemLocation,
           dvbRcsSystemOduAntennaSize,
           dvbRcsSystemOduAntennaGain,
           dvbRcsSystemOduSspa,
           dvbRcsSystemOduTxType,
           dvbRcsSystemOduRxType,
           dvbRcsSystemOduRxBand,
           dvbRcsSystemOduRxLO,
           dvbRcsSystemOduTxLO,
           dvbRcsTcpPep,
           dvbRcsHttpPep
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing information
           applicable for basic device management support."
   ::= {dvbRcsRcstGroups 1}

   --=============================================================
   --    object groups for RCST networking
   --=============================================================
   dvbRcsRcstNetworkGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsNetworkOamInetAddressType,
           dvbRcsNetworkOamInetAddress,
           dvbRcsNetworkOamInetAddressPrefixLength,

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           dvbRcsNetworkLanInetAddressType,
           dvbRcsNetworkLanInetAddress,
           dvbRcsNetworkLanInetAddressPrefixLength,
           dvbRcsNetworkConfigFileDownloadUrl,
           dvbRcsNetworkConfigFileUploadUrl,
           dvbRcsNetworkLogFileUploadUrl
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing basic networking
           management support."
   ::= {dvbRcsRcstGroups 2}

   dvbRcsRcstExtNetworkGroup OBJECT-GROUP
       OBJECTS {
         dvbRcsNetworkOamInetAddressAssign,
         dvbRcsNetworkAirInterfaceDefaultGatewayInetAddressType,
         dvbRcsNetworkAirInterfaceDefaultGatewayInetAddress,
         dvbRcsNetworkAirInterfaceDefaultGatewayInetAddressPrefixLength,
         dvbRcsNetworkNccMgtInetAddressType,
         dvbRcsNetworkNccMgtInetAddress,
         dvbRcsNetworkNccMgtInetAddressPrefixLength
         }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing extended networking
           management support."
   ::= {dvbRcsRcstGroups 3}

   dvbRcsRcstDnsGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsPrimaryDnsServerInetAddressType,
           dvbRcsPrimaryDnsServerInetAddress,
           dvbRcsPrimaryDnsServerInetAddressPrefixLength,
           dvbRcsSecondaryDnsServerInetAddressType,
           dvbRcsSecondaryDnsServerInetAddress,
           dvbRcsSecondaryDnsServerInetAddressPrefixLength
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing DNS management
           support."
   ::= {dvbRcsRcstGroups 4}

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   --=============================================================
   --    object groups for RCST installation
   --=============================================================

   dvbRcsRcstInstallGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsInstallAntennaAlignmentState,
           dvbRcsInstallCwFrequency,
           dvbRcsInstallCwMaxDuration,
           dvbRcsInstallCwPower,
           dvbRcsInstallCoPolReading,
           dvbRcsInstallXPolReading,
           dvbRcsInstallCoPolTarget,
           dvbRcsInstallXPolTarget,
           dvbRcsInstallStandByDuration,
           dvbRcsInstallTargetEsN0
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing information
           applicable for basic installation support."
   ::= {dvbRcsRcstGroups 5}

   dvbRcsRcstExtInstallGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsNetworkInstallLogFileDownloadUrl,
           dvbRcsNetworkInstallLogFileUploadUrl
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing extended device
           installation support."
   ::= {dvbRcsRcstGroups 6}

   --=============================================================
   --    object groups for QoS
   --=============================================================

   dvbRcsRcstQosGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsPktClassDscpLow,
          dvbRcsPktClassDscpHigh,
          dvbRcsPktClassDscpMarkValue,
          dvbRcsPktClassPhbAssociation,
          dvbRcsPktClassRowStatus,
          dvbRcsPhbName,
          dvbRcsPhbRequestClassAssociation,
          dvbRcsPhbMappingRowStatus,

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          dvbRcsRequestClassName,
          dvbRcsRequestClassChanId,
          dvbRcsRequestClassVccVpi,
          dvbRcsRequestClassVccVci,
          dvbRcsRequestClassCra,
          dvbRcsRequestClassRbdcMax,
          dvbRcsRequestClassRbdcTimeout,
          dvbRcsRequestClassVbdcMax,
          dvbRcsRequestClassVbdcTimeout,
          dvbRcsRequestClassVbdcMaxBackLog,
          dvbRcsRequestClassRowStatus
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing basic access to QoS
          configuration data."
   ::= {dvbRcsRcstGroups 7}

   dvbRcsRcstEnhancedClassifierGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsPktClassIpProtocol,
          dvbRcsPktClassSrcInetAddressType,
          dvbRcsPktClassSrcInetAddress,
          dvbRcsPktClassSrcInetAddressPrefixLength,
          dvbRcsPktClassDstInetAddressType,
          dvbRcsPktClassDstInetAddress,
          dvbRcsPktClassDstInetAddressPrefixLength,
          dvbRcsPktClassSrcPortLow,
          dvbRcsPktClassSrcPortHigh,
          dvbRcsPktClassDstPortLow,
          dvbRcsPktClassDstPortHigh,
          dvbRcsPktClassVlanUserPri
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing support for
          management of the enhanced classifier."
   ::= {dvbRcsRcstGroups 8}

   dvbRcsRcstMpegQosGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsRequestClassPidPoolReference,
          dvbRcsPidValue,
          dvbRcsPidPoolRowStatus
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing access to

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          MPEG-related link QoS configuration data."

   ::= {dvbRcsRcstGroups 9}

   dvbRcsRcstGlobalQosGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsQosGlobalRbdcMax,
          dvbRcsQosGlobalVbdcMax,
          dvbRcsQosGlobalVbdcMaxBackLog
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing access to global RCST
          QoS configuration data."
   ::= {dvbRcsRcstGroups 10}

   dvbRcsRcstStrictQosGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsQosChannelIdStrictDispatching
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects allowing management of strict
          channel ID dispatching."
   ::= {dvbRcsRcstGroups 11}

   --=============================================================
   --    object groups for RCST control
   --=============================================================
   dvbRcsRcstControlGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsCtrlRebootCommand,
           dvbRcsCtrlUserTrafficDisable,
           dvbRcsCtrlCwEnable,
           dvbRcsCtrlDownloadFileCommand,
           dvbRcsCtrlUploadFileCommand,
           dvbRcsCtrlActivateConfigFileCommand,
           dvbRcsCtrlRcstRxReacquire
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects allowing basic RCST control."
   ::= {dvbRcsRcstGroups 12}

   dvbRcsRcstExtControlGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsCtrlRcstTxDisable,
           dvbRcsCtrlOduTxReferenceEnable,

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           dvbRcsCtrlOduTxDCEnable,
           dvbRcsCtrlOduRxDCEnable,
           dvbRcsCtrlRcstLogonCommand,
           dvbRcsCtrlRcstLogoffCommand
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects allowing extended RCST
           control."
   ::= {dvbRcsRcstGroups 13}

   --=============================================================
   --    object groups for RCST state
   --=============================================================

   dvbRcsRcstStateGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsRcstMode,
           dvbRcsRcstFaultStatus,
           dvbRcsRcstFwdLinkStatus,
           dvbRcsRcstLogUpdated,
           dvbRcsRcstCurrentSoftwareVersion,
           dvbRcsRcstAlternateSoftwareVersion,
           dvbRcsRcstActivatedConfigFileVersion,
           dvbRcsRcstDownloadedConfigFileVersion
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects allowing access to RCST state."
   ::= {dvbRcsRcstGroups 14}

   --=============================================================
   --    object groups for forward link
   --=============================================================

   dvbRcsFwdConfigGroup OBJECT-GROUP
       OBJECTS {
               dvbRcsFwdStartPopId,
               dvbRcsFwdStartFrequency,
               dvbRcsFwdStartPolar,
               dvbRcsFwdStartFormat,
               dvbRcsFwdStartRolloff,
               dvbRcsFwdStartSymbolRate,
               dvbRcsFwdStartInnerFec,
               dvbRcsFwdStartRowStatus
           }
       STATUS    current
       DESCRIPTION

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           "A collection of objects providing basic start forward
           link configuration support."
   ::= {dvbRcsRcstGroups 15}

   dvbRcsFwdStatusGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsFwdStatusPopId,
          dvbRcsFwdStatusIfReference,
          dvbRcsFwdStatusNetId,
          dvbRcsFwdStatusNetName,
          dvbRcsFwdStatusFormat,
          dvbRcsFwdStatusFrequency,
          dvbRcsFwdStatusPolar,
          dvbRcsFwdStatusInnerFec,
          dvbRcsFwdStatusSymbolRate,
          dvbRcsFwdStatusRolloff,
          dvbRcsFwdStatusModulation,
          dvbRcsFwdStatusFecFrame,
          dvbRcsFwdStatusPilot,
          dvbRcsFwdStatusBer,
          dvbRcsFwdStatusCnr,
          dvbRcsFwdStatusRxPower
       }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing forward link status."
   ::= {dvbRcsRcstGroups 16}

   --=============================================================
   --    object groups for return link
   --=============================================================
    dvbRcsRtnConfigGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsRtnConfigDefIfLevel
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects providing basic return link
           configuration support."
   ::= {dvbRcsRcstGroups 17}

   dvbRcsRtnExtConfigGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsRtnConfigMaxEirp
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects providing extended return link

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          configuration support."
   ::= {dvbRcsRcstGroups 18}

   dvbRcsRtnStatusGroup OBJECT-GROUP
      OBJECTS {
          dvbRcsRtnStatusPayloadUnit
          }
      STATUS    current
      DESCRIPTION
          "A collection of objects allowing access to return link
          status."
   ::= {dvbRcsRcstGroups 19}

   dvbRcsRtnExtStatusGroup OBJECT-GROUP
       OBJECTS {
           dvbRcsRcstRtnLinkStatus,
           dvbRcsRtnStatusEbN0,
           dvbRcsRtnStatusSFDuration
           }
       STATUS    current
       DESCRIPTION
           "A collection of objects allowing access to extended
           return link status."
   ::= {dvbRcsRcstGroups 20}

   dvbRcsRcstOduListGroup OBJECT-GROUP
          OBJECTS {
              dvbRcsOduTxTypeDescription,
              dvbRcsOduTxType,
              dvbRcsOduRxTypeDescription,
              dvbRcsOduRxType,
              dvbRcsOduAntennaTypeDescription,
              dvbRcsOduAntennaType
              }
          STATUS    current
          DESCRIPTION
              "A collection of objects supporting flexible
              selection of ODU devices."
   ::= {dvbRcsRcstGroups 21}

   END

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5.  Security Considerations

   This MIB module relates to a system that allows end users to access a
   private network or public Internet access.  As such, improper
   manipulation of the MIB objects represented by this MIB module may
   result in denial of service to a large number of end users.

   There are a number of management objects defined in this MIB module
   with a MAX-ACCESS clause of read-write and/or read- create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.  These are the tables and objects and their
   sensitivity/vulnerability:

   o  The use of the dvbRcsNetworkNccMgtInetAddress object to specify
      management stations is considered only limited protection and does
      not protect against attacks that spoof the management station's IP
      address.  The use of stronger mechanisms, such as SNMPv3 security,
      should be considered, where possible.

   o  The dvbRcsSystemOdu objects, dvbRcsCtrlCwEnable,
      dvbRcsRtnConfigMaxEirp, dvbRcsRtnConfigDefIfLevel objects, and
      dvbRcsRcstInstall sub-tree can, if improperly or maliciously used,
      lead to unwanted emissions or emission levels on the satellite
      uplink, thereby resulting in potential degradation of the RCS
      service or other services using the frequency band being used.

   o  The RCST may have its configuration file changed by the actions of
      the management system using a combination of the following
      objects: dvbRcsNetworkInstallLogFileDownloadUrl,
      dvbRcsCtrlDownloadFileCommand,
      dvbRcsCtrlActivateConfigFileCommand, or dvbRcsCtrlRebootCommand.
      An improper configuration file download may result in substantial
      vulnerabilities and the loss of the ability of the management
      system to control the satellite terminal.

   o  Setting dvbRcsNetworkLogFileUploadUrl to a wrong address may
      potentially impact debugging/troubleshooting efforts.

   o  Setting objects in dvbRcsPktClassTable could cause significant
      changes to default traffic filtering on an RCST.

   Some of the readable objects in this MIB module (i.e., objects with a
   MAX-ACCESS other than not-accessible) may be considered sensitive or
   vulnerable in some network environments.  It is thus important to
   control even GET and/or NOTIFY access to these objects and possibly
   to even encrypt the values of these objects when sending them over

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   the network via SNMP.  These are the tables and objects and their
   sensitivity/vulnerability:

   o  The dvbRcsNetworkNccMgtInetAddress object may provide sufficient
      information for attackers to spoof management stations that have
      management access to the device.

   o  The dvbRcsRcstCurrentSoftwareVersion object may provide hints as
      to the software vulnerabilities of the RCST.

   o  The object dvbRcsNetworkOamInetAddress and the table
      dvbRcsPktClassTable may provide clues for attacking the RCST and
      other subscriber devices.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPsec),
   even then, there is no control as to who on the secure network is
   allowed to access and GET/SET (read/change/create/delete) the objects
   in this MIB module.

   It is RECOMMENDED that implementers consider the security features
   provided by the SNMPv3 framework (see [RFC3410], section 8),
   including full support for the SNMPv3 cryptographic mechanisms (for
   authentication and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module, is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

6.  IANA Considerations

   The transmission and ifType numbers described in Section 3 have
   already been assigned under the smi-numbers registry.

7.  Acknowledgments

   The authors thank Gorry Fairhurst for advice in the preparation of
   this document and Bert Wijnen for his review comments.

   The authors recognize this document is a collective effort of the
   SatLabs Group (www.satlabs.org), in particular the many corrections
   and suggestions brought by Juan Luis Manas.

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8.  References

8.1.  Normative References

   [IANA]       Internet Assigned Numbers Authority, "Internet Assigned
                Numbers Authority", June 2008, <http://www.iana.org>.

   [RFC2119]    Bradner, S., "Key words for use in RFCs to Indicate
                Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2578]    McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                "Structure of Management Information Version 2 (SMIv2)",
                STD 58, RFC 2578, April 1999.

   [RFC2579]    McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                "Textual Conventions for SMIv2", STD 58, RFC 2579, April
                1999.

   [RFC2580]    McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                "Conformance Statements for SMIv2", STD 58, RFC 2580,
                April 1999.

   [RFC2863]    McCloghrie, K. and F. Kastenholz, "The Interfaces Group
                MIB", RFC 2863, June 2000.

   [RFC3289]    Baker, F., Chan, K., and A. Smith, "Management
                Information Base for the Differentiated Services
                Architecture", RFC 3289, May 2002.

   [RFC3411]    Harrington, D., Presuhn, R., and B. Wijnen, "An
                Architecture for Describing Simple Network Management
                Protocol (SNMP) Management Frameworks", STD 62, RFC
                3411, December 2002.

   [RFC4001]    Daniele, M., Haberman, B., Routhier, S., and J.
                Schoenwaelder, "Textual Conventions for Internet Network
                Addresses", RFC 4001, February 2005.

   [RFC5017]    McWalter, D., Ed., "MIB Textual Conventions for Uniform
                Resource Identifiers (URIs)", RFC 5017, September 2007.

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8.2.  Informative References

   [ISO-MPEG]   ISO/IEC DIS 13818-1:2000, "Information Technology;
                Generic Coding of Moving Pictures and Associated Audio
                Information Systems", International Organization for
                Standardization (ISO).

   [ITU-ATM]    ITU-T Recommendation I.432 (all parts): "B-ISDN user-
                network interface - Physical layer specification".

   [ITU-AAL5]   ITU-T Recommendation I.363-5 (1996): "B-ISDN ATM
                Adaptation Layer specification: Type 5 AAL".

   [ETSI-DAT]   ETSI EN 301 192, "Digital Video Broadcasting (DVB); DVB
                Specifications for Data Broadcasting", European
                Telecommunications Standards Institute (ETSI).

   [ETSI-DVBS]  ETSI EN 301 421, "Digital Video Broadcasting (DVB);
                Modulation and Coding for DBS satellite systems at 11/12
                GHz", European Telecommunications Standards Institute
                (ETSI).

   [ETSI-DVBS2] ETSI EN 302 307, "Digital Video Broadcasting (DVB);
                Second generation framing structure, channel coding and
                modulation systems for Broadcasting, Interactive
                Services, News Gathering and other broadband satellite
                applications", European Telecommunications Standards
                Institute (ETSI).

   [ETSI-GSE]   ETSI TS 102 606, "Digital Video Broadcasting (DVB);
                Generic Stream Encapsulation (GSE) Protocol", European
                Telecommunications Standards Institute (ETSI).

   [ETSI-RCS]   ETSI 301 790, "Digital Video Broadcasting (DVB);
                Interaction Channel for Satellite Distribution Systems",
                European Telecommunications Standards Institute (ETSI).

   [ETSI-SI]    ETSI EN 300 468, "Digital Video Broadcasting (DVB);
                Specification for Service Information (SI) in DVB
                Systems", European Telecommunications Standards
                Institute (ETSI).

   [RFC3410]    Case, J., Mundy, R., Partain, D., and B. Stewart,
                "Introduction and Applicability Statements for Internet-
                Standard Management Framework", RFC 3410, December 2002.

   [SATLABS]    SatLabs System Recommendations,
                <http://www.satlabs.org>.

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Authors' Addresses

   Stephane Combes
   ESTEC
   European Space Agency
   Keplerlaan 1
   P.O. Box 299
   2200 AG Noordwijk ZH
   The Netherlands

   EMail: stephane.combes@esa.int
   URL:   telecom.esa.int


   Petter Chr. Amundsen
   VeriSat AS
   P.O Box 1
   1330 Fornebu
   Norway

   EMail: pca@verisat.no
   URL:   www.verisat.no


   Micheline Lambert
   Advantech Satellite Networks
   2341 boul. Alfred-Nobel
   Saint-Laurent (Montreal)
   H4S 2A9
   Quebec, Canada

   EMail: micheline.lambert@advantechamt.com
   URL:   www.advantechsatnet.com


   Hans Peter Lexow
   STM Norway
   Vollsveien 21
   1366 Lysaker
   Norway

   EMail: hlexow@stmi.com
   URL:   www.stmi.com